An example of nesting Repeater in Repeater is described

 
protected void Page_Load(object sender, EventArgs e) 
{ 
if (!Page.IsPostBack) 
{ 
this.dtCategory = GetCategoryTable(); 
this.dtProduct = GetProductTable(); 
rptCategoryList.DataSource = dtCategory; 
rptCategoryList.DataBind(); 
} 
} 
//  To prepare 1 A classification table  
DataTable GetCategoryTable() 
{ 
DataTable dt = new DataTable(); 
dt.Columns.Add("CategoryId", typeof(int)); 
dt.Columns.Add("CategoryTitle", typeof(string)); 
for (int i = 1; i <= 3; i++) 
{ 
DataRow row = dt.NewRow(); 
row["CategoryId"] = i; 
row["CategoryTitle"] = " Category name  " + i + ""; 
dt.Rows.Add(row); 
} 
return dt; 
} 
//  To prepare 1 A product table  
DataTable GetProductTable() 
{ 
DataTable dt = new DataTable(); 
dt.Columns.Add("ProductTitle", typeof(string)); 
dt.Columns.Add("CategoryId", typeof(int)); 
for (int i = 1; i <= 9; i++) 
{ 
DataRow row = dt.NewRow(); 
row["ProductTitle"] = " The product name  " + i + ""; 
if (i > 6) row["CategoryId"] = 3; 
else if (i > 3) row["CategoryId"] = 2; 
else row["CategoryId"] = 1; 
dt.Rows.Add(row); 
} 
return dt; 
} 
//  Get a product category  
DataTable GetProductTable(int categoryId) 
{ 
DataView dv = this.dtProduct.DefaultView; 
dv.RowFilter = " CategoryId=" + categoryId + " "; 
return dv.ToTable(); 
} 
protected void rptCategoryList_ItemDataBound(object sender, RepeaterItemEventArgs e) 
{ 
if (e.Item.ItemType == ListItemType.AlternatingItem || e.Item.ItemType == ListItemType.Item) 
{ 
DataRowView drv = (DataRowView)e.Item.DataItem; 
Literal ltlTitle = (Literal)e.Item.FindControl("ltlTitle"); 
ltlTitle.Text = drv["CategoryTitle"].ToString(); 
Repeater rptProductList = (Repeater)e.Item.FindControl("rptProductList"); 
rptProductList.DataSource = GetProductTable(Convert.ToInt32(drv["CategoryId"])); 
rptProductList.DataBind(); 
} 
} 
protected void rptProductList_ItemDataBound(object sender, RepeaterItemEventArgs e) 
{ 
if (e.Item.ItemType == ListItemType.AlternatingItem || e.Item.ItemType == ListItemType.Item) 
{ 
DataRowView drv = (DataRowView)e.Item.DataItem; 
Literal ltlTitle = (Literal)e.Item.FindControl("ltlTitle"); 
ltlTitle.Text = drv["ProductTitle"].ToString(); 
} 
} 

 
<</CODE>form id="form1" runat="server"> 
<</CODE>div> 
<</CODE>asp:Repeater ID="rptCategoryList" runat="server" OnItemDataBound="rptCategoryList_ItemDataBound"> 
<</CODE>ItemTemplate> 
<</CODE>div class="listBox"> 
<</CODE>div class="title"> 
<</CODE>asp:Literal ID="ltlTitle" runat="server"></</CODE>asp:Literal></</CODE>div> 
<</CODE>div class="content"> 
<</CODE>ul> 
<</CODE>asp:Repeater ID="rptProductList" runat="server" OnItemDataBound="rptProductList_ItemDataBound"> 
<</CODE>ItemTemplate> 
<</CODE>li> 
<</CODE>asp:Literal ID="ltlTitle" runat="server"></</CODE>asp:Literal> 
</</CODE>li> 
</</CODE>ItemTemplate> 
</</CODE>asp:Repeater> 
</</CODE>ul> 
</</CODE>div> 
</</CODE>div> 
</</CODE>ItemTemplate> 
</</CODE>asp:Repeat</</CODE>div> 
</</CODE>form>